Big truck

Data table



SIZEETPCDCB
28X16-1016X139.778.1
24x12-446x139.778.1
24x14-766x139.778.1
22*12-446*139.778.1
26X14-766x139.778.1

GMC Sierra 1500 / 2500 / 3500 Complete Tuning Guide

Basic Factory Specs

GMC Sierra 1500 (Half-Ton)

  • PCD: 6×139.7mm

  • Center Bore: 78.1mm

  • Lug Stud: M14×1.5

  • Factory Offset: ET24 ~ ET31

  • Engines: 2.7L Turbo / 5.3L V8 / 6.2L V8 / 3.0L Duramax Diesel

GMC Sierra 2500 / 3500 HD (Heavy Duty)

  • PCD: 8×180mm

  • Center Bore: 124.1mm

  • Lug Stud: M14×1.5

  • Factory Offset: ET35 ~ ET45

  • Engines: 6.6L Duramax Diesel / 6.6L V8 Gasoline


1. Powertrain Tuning

Sierra 1500

  • ECU Tune: Better throttle response, +40–80 HP, improved fuel economy

  • Cold air intake + 3-inch cat-back exhaust for deeper sound & power gain

  • 2.7L Turbo: Stage 2 tuning up to 350+ HP

  • 6.2L V8: Supercharger upgrade reaches 600+ HP

  • 3.0L Duramax: Tune + exhaust for higher torque & towing performance

Sierra 2500 / 3500 HD

  • 6.6L Duramax Diesel: Stage 1–3 ECU tuning, big torque increase for towing & off-road

  • 4–5 inch turbo-back exhaust for aggressive diesel tone

  • Upgrade intercooler, fuel injectors & high-pressure pump for high-power builds

  • Transmission tuning mandatory to handle extra torque


2. Suspension & Lift Tuning

Sierra 1500

  • 2" Leveling Kit: Level stance, fits 33" tires, daily friendly

  • 2.5–4" Suspension Lift: Fox/Icon coilovers, fits 35" tires, off-road ready

  • 6"+ Extreme Lift: For 24×12 large wheel show truck builds

Sierra 2500 / 3500 HD

  • 2.5–3.5" Leveling Kit: Mild lift for 35" tires, towing optimized

  • 4–6" Full Lift: Heavy-duty shocks, fits 37" tires

  • 8–10" Extreme Lift: For 22×12 / 24×14 / 26×14 / 26×16 big wheel setups

  • Common upgrades: Adjustable upper control arms, dual steering stabilizer, heavy-duty leaf springs


3. Wheels & Tires Tuning

Sierra 1500 Fitment

  • 18×9 / 20×9 / 20×10: ET+10 ~ +25 | Stock / Leveled

  • 22×10: ET0 ~ -12 | 2.5–4" Lift

  • 24×12: ET-44 | 4–6" Lift

  • Tire: 33×12.5R20 / 35×12.5R22 / 35×13.5R24

Sierra 2500 / 3500 HD Fitment

  • 20×10: ET-18 ~ -24 | 4" Lift

  • 22×12: ET-44 ~ -51 | 6" Lift

  • 24×14: ET-70 ~ -76 | 6–8" Lift

  • 26×14 / 26×16: ET-76 ~ -95 | 8–10" Lift + Widebody

  • Tire: 35/37/40 inch A/T & M/T tires

  • Note: 24×14 and above must use forged wheels


4. Exterior Styling

  • Custom GMC letter mesh grille

  • Functional heat extraction hood

  • Carbon fiber body trim

  • Wide fender flares for lifted big wheel builds

  • Steel front/rear bumpers + side steps

  • 40-inch LED light bar, smoked headlights

  • Blackout package & custom badging


5. Classic Build Styles

  • Daily Luxury: Level kit + 20/22" wheels + A/T tires + intake/exhaust + ECU tune

  • Off-Road Aggressive: 3–6" lift + negative offset wheels + M/T tires

  • Heavy Duty Tow: 2500/3500 level kit + 20×10 wheels + diesel tune

  • Show Truck: 6–10" extreme lift + 24×14 / 26×16 deep dish forged wheels


6. Installation Tips

  • Use hub-centric rings to eliminate vibration

  • Wheel torque: 150 N·m (1500) / 175 N·m (2500/3500)

  • Big negative offset must match lift height to avoid fender rubbing

  • Lifted trucks require professional 4-wheel alignment

  • HD models prioritize high load rating for wheels



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